153 lines
3.1 KiB
C
153 lines
3.1 KiB
C
/* auxio.c: Probing for the Sparc AUXIO register at boot time.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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*
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* Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <asm/oplib.h>
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#include <asm/io.h>
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#include <asm/sbus.h>
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#include <asm/ebus.h>
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#include <asm/auxio.h>
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/* This cannot be static, as it is referenced in irq.c */
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void __iomem *auxio_register = NULL;
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enum auxio_type {
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AUXIO_TYPE_NODEV,
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AUXIO_TYPE_SBUS,
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AUXIO_TYPE_EBUS
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};
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static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
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static DEFINE_SPINLOCK(auxio_lock);
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static void __auxio_sbus_set(u8 bits_on, u8 bits_off)
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{
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if (auxio_register) {
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unsigned char regval;
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unsigned long flags;
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unsigned char newval;
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spin_lock_irqsave(&auxio_lock, flags);
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regval = sbus_readb(auxio_register);
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newval = regval | bits_on;
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newval &= ~bits_off;
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newval &= ~AUXIO_AUX1_MASK;
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sbus_writeb(newval, auxio_register);
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spin_unlock_irqrestore(&auxio_lock, flags);
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}
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}
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static void __auxio_ebus_set(u8 bits_on, u8 bits_off)
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{
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if (auxio_register) {
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unsigned char regval;
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unsigned long flags;
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unsigned char newval;
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spin_lock_irqsave(&auxio_lock, flags);
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regval = (u8)readl(auxio_register);
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newval = regval | bits_on;
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newval &= ~bits_off;
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writel((u32)newval, auxio_register);
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spin_unlock_irqrestore(&auxio_lock, flags);
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}
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}
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static inline void __auxio_ebus_set_led(int on)
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{
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(on) ? __auxio_ebus_set(AUXIO_PCIO_LED, 0) :
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__auxio_ebus_set(0, AUXIO_PCIO_LED) ;
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}
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static inline void __auxio_sbus_set_led(int on)
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{
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(on) ? __auxio_sbus_set(AUXIO_AUX1_LED, 0) :
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__auxio_sbus_set(0, AUXIO_AUX1_LED) ;
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}
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void auxio_set_led(int on)
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{
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switch(auxio_devtype) {
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case AUXIO_TYPE_SBUS:
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__auxio_sbus_set_led(on);
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break;
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case AUXIO_TYPE_EBUS:
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__auxio_ebus_set_led(on);
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break;
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default:
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break;
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}
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}
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static inline void __auxio_sbus_set_lte(int on)
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{
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(on) ? __auxio_sbus_set(AUXIO_AUX1_LTE, 0) :
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__auxio_sbus_set(0, AUXIO_AUX1_LTE) ;
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}
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void auxio_set_lte(int on)
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{
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switch(auxio_devtype) {
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case AUXIO_TYPE_SBUS:
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__auxio_sbus_set_lte(on);
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break;
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case AUXIO_TYPE_EBUS:
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/* FALL-THROUGH */
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default:
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break;
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}
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}
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void __init auxio_probe(void)
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{
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struct sbus_bus *sbus;
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struct sbus_dev *sdev = NULL;
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for_each_sbus(sbus) {
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for_each_sbusdev(sdev, sbus) {
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if(!strcmp(sdev->prom_name, "auxio"))
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goto found_sdev;
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}
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}
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found_sdev:
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if (sdev) {
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auxio_devtype = AUXIO_TYPE_SBUS;
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auxio_register = sbus_ioremap(&sdev->resource[0], 0,
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sdev->reg_addrs[0].reg_size,
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"auxiliaryIO");
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}
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#ifdef CONFIG_PCI
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else {
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struct linux_ebus *ebus;
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struct linux_ebus_device *edev = NULL;
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for_each_ebus(ebus) {
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for_each_ebusdev(edev, ebus) {
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if (!strcmp(edev->prom_name, "auxio"))
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goto ebus_done;
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}
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}
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ebus_done:
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if (edev) {
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auxio_devtype = AUXIO_TYPE_EBUS;
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auxio_register =
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ioremap(edev->resource[0].start, sizeof(u32));
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}
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}
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auxio_set_led(AUXIO_LED_ON);
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#endif
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}
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